Ian Tattersall

"When homo sapiens made their entrance 100,000 years ago they were confronted by a wide range of other early humans--homo erectus, who walked better and used fire; homo habilis who used tools; and of course the Neanderthals, who were brawny and strong. But shortly after their arrival, something happened that vaulted the species forward and made them the indisputable masters of the planet. This book is devoted to revealing just what that difference...